A car used in a hit-and-run that left a Merton traffic officer in a critical condition this morning has been found.

The hit-and-run happened at on the A217 Reigate Avenue near to the junction of Rosehill, Sutton at just before 1am this morning.

The officer was on foot carrying out a speed enforcement operation and had signalled for a speeding black VW Golf to pull over when the car collided with the officer and drove off toward Rosehill.

**UPDATE: Police officer has broken neck**

The officer, who is aged in his 40s and based at the south west Traffic Garage in Merton, was taken to a south London hospital where he remains in a critical condition.

The vehicle has been found dumped nearby in Hyde Walk in Morden.

Officers from the Traffic Operational Command Unit are investigating and enquiries are underway to trace the driver.

Detective Sergeant Steve Pidgeon, an officer at the scene, said: "The car was found early this morning. The car has just been taken away, it was a balck VW Golf.

"There have been no arrests, its not linked to any premises in the vicinity."

The car has been taken away by police for close forensic examination.

Forensic teams are also beginning a search of front gardens and the street and surrounding area for clues. The search is expected to take a significant period of time.

Your Local Guardian:

Officers search for clues near where the car was found

A police spokesman said the Met was providing support to the PC's family, and his colleagues, at this difficult time.

Sir Bernard Hogan Howe, Commissioner of the Met Police, said: "An officer injured on duty is always upsetting for all of us in the Met and our best wishes are with him at this time.

"We will of course ensure that he, his family and his colleagues are being fully supported and a thorough investigation into the incident has already begun.

"Whilst serious injuries on duty are thankfully rare, it is a reminder of the courage of our front-line staff when carrying out their role to keep London safe."

Anyone with information of who may have seen the incident should call the investigation team 020 8941 9011.